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Lintel · Grades 5–7 Keystones #23 23 January 2026
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Keystones — Lintel

Five GCSE retrieval questions · 23 January 2026 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 826 + 566

    Answer: 826 + 566 = 1392
  2. 2. Algebra

    Solve: x⁄4 = 2.5

    Answer: x = 10
  3. 3. Geometry

    Find c if a = 20cm and b = 10cm in a right triangle

    Answer: 22.4cm
  4. 4. Ratio

    Calculate 47.4% of 831

    Answer: 393.89
  5. 5. Statistics

    A bag has 7 red and 7 blue balls. What is the probability of picking a red ball?

    Answer: 1⁄2

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